Designing Timber issue 10 for online - Flipbook - Page 65
UNDERSTANDING
———— SPAN TABLES ————
C16 AND C24
SPAN TABLES FROM TDUK
Span tables are the most commonly requested form of data we receive from
builders. Timber Development UK hosts a suite of span tables for C16 and C24
timber grades. They can be downloaded for free from the TDUK website.
Calculating spans
Span tables allow you to calculate the size of a timber member of a particular
strength class required for a given span – as well as the maximum spacing
between each section or timber member. They help you to choose an
appropriate size and stress grade to achieve your spanning requirements.
What do the tables include?
These new tables provide guidance on the loadbearing capacity of timber
members to give adequate support to 昀氀oors, ceilings, and roofs in domestic
dwellings. They include tables for:
•
Domestic ceiling joists
•
Domestic 昀氀at roof joists
•
Domestic 昀氀oor joists
•
Single span common or jack
rafters.
Visit the TDUK 'Resources' page to download your span tables now
DESIGNING TIMBER
65
NOV/DEC 2025
